The Economic Times

In 1899, a Swiss city built a railway powered by wastewater; wastewater makes one car heavy enough to pull the other uphill without using a motor

Opened in 1899, Fribourg's funicular uniquely connects the upper and lower districts by harnessing the power of gravity and wastewater rather than a motor. An essential transit link for locals, it overcame modernization threats through community dedication, preserving its historic design and function after extensive renovations in 1998, supported by city government funding.